/**
 * Copyright (c) 2007-2008 Nearchos Paspallis
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

/**
 * AspectSense
 *
 * Middleware for annotation-based, context-aware and adaptive services for
 * mobile and ubiquitous computing
 *
 * This project is an open-source effort, initiated by Nearchos Paspallis as
 * part of his PhD work at the University of Cyprus (http://www.ucy.ac.cy).
 *
 * More information about the project is available at "http://aspectsense.org".
 */

package org.aspectsense.example_apps.digitalassistant;

import org.aspectsense.framework.DefaultComponent;
import org.aspectsense.framework.Stateful;

import javax.swing.*;
import java.awt.*;
import java.util.*;

import sun.awt.VerticalBagLayout;

/**
 * @author Nearchos Paspallis [nearchos@cs.ucy.ac.cy]
 *         Date: Feb 26, 2008
 *         Time: 12:24:32 PM
 */
public class VisualUI extends DefaultComponent implements UI, Stateful
{
    final SortedSet<Appointment> sortedAppointments = new TreeSet<Appointment>();

    private JFrame frame;
    private JPanel appointmentsPanel;

    // ----------------- Handling life-cycle operations --------------------- //

    public void init()
    {
        super.init();

        frame = new JFrame("Visual UI Component") {
            public Dimension getPreferredSize() {
                return new Dimension(400,200);
            }
        };
        frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

        frame.getContentPane().setLayout(new BorderLayout());

        appointmentsPanel = new JPanel(new VerticalBagLayout());
        appointmentsPanel.setBackground(Color.WHITE);

        frame.getContentPane().add(new JScrollPane(appointmentsPanel), BorderLayout.CENTER);

        frame.setLocation(100,100);
        frame.pack();
    }

    public void activate()
    {
        super.activate();

        updateUI();
        frame.setVisible(true);
    }

    public void suspend()
    {
        frame.setVisible(false);

        super.suspend();
    }

    public void finit()
    {
        frame.dispose();
        frame = null;
        appointmentsPanel = null;

        sortedAppointments.clear();

        super.finit();
    }

    // -------------- End of Handling life-cycle operations ----------------- //

    private void updateUI()
    {
        // update shown appointments
        appointmentsPanel.removeAll();
        for(final Appointment appointment : sortedAppointments)
        {
            final JPanel appointmentPanel = new JPanel(new BorderLayout());
            appointmentPanel.setOpaque(false);
            final JLabel label = new JLabel(appointment.toHTML());
            appointmentPanel.setBorder(BorderFactory.createTitledBorder(appointment.getFromDate().toString()));
            appointmentPanel.add(label, BorderLayout.CENTER);
//            appointmentsPanel.add(getAppointmentPanel(appointment));
            appointmentsPanel.add(appointmentPanel);
        }

        // update the graphics
        appointmentsPanel.updateUI();
    }

    private JPanel getAppointmentPanel(final Appointment appointment)
    {
        final JPanel appointmentPanel = new JPanel(new BorderLayout());
        appointmentPanel.setOpaque(false);

        appointmentPanel.setBorder(BorderFactory.createTitledBorder(appointment.getName()));
        appointmentPanel.add(new JLabel(appointment.toHTML()), BorderLayout.CENTER);

        return appointmentPanel;
    }

    // --------------- Implementing the UI defined methods ------------------ //

    public void addedAppointment(final Appointment addedAppointment)
    {
        sortedAppointments.add(addedAppointment);

        updateUI();
    }

    public void cancelledAppointment(final Appointment cancelledAppointment)
    {
        sortedAppointments.remove(cancelledAppointment);

        updateUI();
    }

    public void modifiedAppointment(final Appointment previousAppointment, final Appointment newAppointment)
    {
        sortedAppointments.remove(previousAppointment);
        sortedAppointments.add(newAppointment);

        updateUI();
    }

    public void communicateCompleteAgenda()
    {
        // just make sure the complete agenda is visible
        frame.setVisible(true);
    }

    // ------------- End of Implementing the UI defined methods ------------- //

    // ------------- Implementing the Stateful defined methods -------------- //

    public Object getState()
    {
        return new TreeSet<Appointment>(sortedAppointments);
    }

    public Object setState(final Object state)
    {
        if(state == null)
        {
            throw new NullPointerException("Illegal null argument");
        }

        final TreeSet<Appointment> oldState
                = new TreeSet<Appointment>(sortedAppointments);

        try
        {
            final TreeSet<Appointment> newState = (TreeSet<Appointment>) state;
            sortedAppointments.clear();
            sortedAppointments.addAll(newState);
        }
        catch (ClassCastException cce)
        {
            throw new IllegalArgumentException("The state could not be casted"
                    + " to a set of Appointments");
        }

        return oldState;
    }

    // ---------- End of Implementing the Stateful defined methods ---------- //
}